A discovery deep within a cave in Spain has challenged the history of human artistic expression. Researchers have determined ...

Scientists analysed tiny layers of calcium carbonate that had formed on top ... “It is noteworthy that the oldest cave art we have found in Sulawesi thus far consists of recognisable scenes ...

“These narrative artworks seem to have been very important to these early people in Sulawesi,” he said ... elements such as uranium within the calcium carbonate crusts that form naturally ...

In 2017, archaeologist Adam Brumm received an exciting WhatsApp message: His colleagues in Sulawesi ... decay of uranium into thorium from calcium carbonate deposits. The deposits are often ...